#include "Add.h"
#include "Sub.h"
#include "Mul.h"
#include "Div.h"

int main() {
  int a = 30;
  int b = 10;
  printf("a + b = %d\n", Add(a, b));
  printf("a - b = %d\n", Sub(a, b));
  printf("a * b = %d\n", Mul(a, b));
  printf("a / b = %d\n", Div(a, b));
  return 0;
}
